Blue-flame burner.



A. J. BLACKFORD.

BLUE FLAME BURNER. APPLICATION FILED D110. 14, 1905.

Ifatented Mar. 16, 1909'.

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BLUE FLAME BURNER.

APPLIOATION FILED DEO.14, 1905.

Patented Mar. 16, 1909.

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BLUE FLAME BURNER.

APPLICATION FILED DEO.14, 1905.

Patented Mar. 16, 1909.

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A'rwELrJ-J. BLAOKFORD, oEcLEv LANn, 'on o, asslenon 'ro AMERICAN s'rovE COMPANY, or JE SEY CITY, N W JERSEY, A CORPORATION or. NEW JERSEY.

BLUE-FLAME BURNER.

i Application filed December Tl 's mvention relates to improvements inblue flame burners, and pertains'to that class in which kerosene oil is used, and from which the vapors or gases are generated and supplied to a combustion section constructed to produce therefrom a blue flame by the admixture therewith of air within the-combustion section.

The primary object of my present-- tion is'to cons-truct'a blueflame burner which will produce a blue flame of the usualcom-- mercial annular area or size, from a generator wlnch 1S conslderably smaller in annular area or size, whereby certain advantages, to be I the burner for some time, in order to obtainhereinaft'er explained, are obtained. 1

My invention is adapted for either an ad justa-ble wick generator, or a trough generator with a non-adjustable wick, and I have herein shown the present invention as applied to both-forms-of generators.

In the accompanying drawings, Figure 1,

view of acom-plete stove with my improvement applied thereto, and in which the trough and non-adjustable wick form of generator isshown. Fig. ,2, is an enlarged sectional-view through the trough and non-adjustable wick type of generator combined with the improved form of combustion 'sec tion. Fig. 3, is an enlarged, detached, perspective view of the trough with the non-adjustable wick shown removed therefrom. Fig. 4, is a sectional view of a complete stove showing the adjustable .wick form of generator with the improved combustion section.

Fig. 5, is an inverted plan view of the shield located around the upper portion ofthe wick generator of Fig. 4. v

In blue flame stoves. heretofore placed upon the market, the generator has been of a diameter or size equal to the diameterof the perportion of the combustion section, and e concentric combustion tubes are of the same diameter at their'lower ends as at their To state it in another way, in

i which contains a'large amount of the liquid inven=- Patented March 16, 19 09.

Specification of Letters Patent.

14, 1906. Serial No. 291,801.

I stoves now on the market, the generator is of a size-in diameter equal to the diameter of the flame which issues from the upper end of the combustion section.

In the trough form of generator, which has been on the market for a number of years, the trough contains a considerable quantity. of oil, owing to its diameter, and manufac turers have recognized the consequent inherent result that the flame is not under quick control of the operator, because of the large amount. of oil contained in the large trough generator, and in the correspondingly large non-adjustable wick located therein,

oil. Therefore, in order to reduce the flame the supply of oil-is cut off-by a valve, but bef fore any difference in-the size ofthe flame eflec'ted, a considerable portion ofthe large supply of oil-inthe trough and inthe 7 must burn out. In practice, this has been found to, require considerable time, and this in. turn necessitates that the operator watch the desired reduced flame. Although thisundesirable result has been recognized for several-years, so far as I am aware it has not been cured.

' The foregoing recognized result I am en-- abledto overcome by means ofmy presentinvention in which I use a small trough and non- -a'djustable' wick generator, which holdsa small amount of oil in both the trough-and the wick, so that when-the supply is reduced, the effect is almost. immediately noticeable upon the flame, while at the same time by the combination with the small trough and wick generator in proportion to the combustion section has been used, as stated abovein. respect. to the trough. generator and its.

I .juste which is desirable in order to produce thereof, and to obtain the same degree of to a size corresponding to the diameter of the tween them a straight-walled combustion tions of the usual blue flame adjustable wick tion 8 of the outer combustion tube.

combustion section. 'In the adjustable wick enerator, the large size wick has made it difficult to provide a wick raiser which would at all times lift the wick correspondingly throu hout its circumference when being ad-' a uniform and even flame. The large wicks have also been unhandy and difficult for the user to remove and replace properly a new wick. They have been expensive because of the size of'the necessarily comparatively long wick tubes of a diameter substantially that of the diameters of the inner and outer straight-wall combustion tubes.

I am enabled by my present invention to overcome the foregoing recognized condiburner, by providing a small adjustable wick enerator and combining therewith a comustion section which is adapted to expand a small flame at the lower portion of the combustion section into the usual commercial size flame at the upper or heating end heating qualities. Referring now to the construction which enables me to -.p'roduc e this result, I will describe first the improved combustion section which is combined 7 inner walls of the two forms of generators, and which is seated thereon. The foregoing construction produces an annular combustion chamber with a vertical upper portion, and a truncated-cone-shaped lower portion. The trough and non-adjustable wick generator is indicated by 5, and the adjustable wick generator is indicated by 6. Preferably, the extreme lower ends of the contracted portions of the inner and outer combustion tubes are provided respectively with the straight extensions 7 and 8 which form heportion 9 which is found to be advantageous in the operation of my improved burner. The inner wall 10 of the trough has its upper portion provided with an L-shaped flange 11 to receive the lower straight portion 7 of the inner combustion tube, and the outer wall 12 I of the trough is provided with an annular L- d shaped flange 14 to receive the straight por- By reference to Fig. 4, it will be seen that the inner .rat'ions in the contracted or incline inclined portion, instead-of g rim of the inner com ustion tube.

and outer Wick tubes of the adjustable wick generator 6, areprovided. with '-L-shaped an es corres onding to the .L-shaped-flanges of t e troug and to receive the straight lower portions ofthe inner and outer combustion tubes. Placed in the trough-is the usualnon-adjustable wick 15. p

For the purpose of insuring the passage of the proper amount of air through the erfotion 3 of the outer combustion tube, I extend an apron or shield 16 therearound which por-' forms an air-pocket to catch the air and cause it to pass through the openings in the ding upward thereby, as it would otherwise have a tendany to do. This shield has its upper end bent over the connecting joint 17, as shown at 18. Attention is also directed to the fact that the upper straight portions of the inner and outer combustion tubes are formed of separate pieces of sheet metal from the lower contracted portion thereof, thus forming the upper and lower sections, and that these upper and lower sections of the said inner and outer tubes are suitably connected As just stated, the joint17 serves to connect the sections of the outer tube, while the joint 19 serves to connect the sections of the inner combustion tube.

As clearly shown, both the trough and the adjustable wick generators are annular in form, which provides in the trough generator a-central air passage 20, and in the adjustable wick generator, a central air passage 21, which provide for a su ply of air to the inte-' In the trough generator form, I surround the trough with a dish or cup-shaped member 22 which has its vertical portion stopping at a point below the lower edge of the shield 16 to provide an air passage 23 to the shield between it and the contracted portion of the outer combustion tube. In this way a limited amount of air is permitted to pass to the space inclosed by the shield, and the amount is readily regulated in the construction of the burner to the quantity necessary for proper operation. Furthermore, the. surrounding cup 22 serves to. retain the radiated heat to a considerable extent around the trough, thus increasing its generating power to supply the necessary amount of'vapor or gases for the larger portion of the combustion section under all conditions-in the burner. I find this feature desirable, though not absolutely necessary to the operation of my improved burner. In both the types of burners, the combustion sections are surrounded with the usual drum or air shield 24for the purpose of protecting the combustion section from air rafts.

Referring now to the adjustable wick form of generator, it will be observed that this is also rovided with the cup-shaped shield or mem er 22' which also serves to regulate the quantity of air passing within the space surrounded by the-shield 16. The cup-shaped member 22' in the adjustable wick generator,

however, has its bottom portion provided with a plurality of air openings 25, which is p for the purpose of preventing the outer Wick with each form of generator, without departing from my present invention;-

In the adjustable wick generator, there is preferably provided the well-known elevating device 28 which is adapted to engage the combustion section and lift it away from the I generator when the burner is not in use, to

prevent the capillation of oil thereon.

Having thus described this invention, what is claimed and desired tocbe secured by Letters Patent, is:

sageway, in combination with an annular combustlon section conslstmg. of perforated parallel tubes spaced apart, the upper portion of the combustion section larger in diameter than said generator, and having a I desire it toblue flame oil burner comprising an annular generator, having a central air-pas- 1n presence truncated cone-sha ed lower portion, the lower extremity of t e latter of a diameter to fit the upper end of the generator, and form a center air passage registering with the central air assage-way of the generator.

2; A. lue flame oil burner comprising an annular generator having a central air-passage-way, m combination wlth an annular combustlon section conslstlng of perforated parallel tubes spaced apart, the upper portion of the combustion section lar er in di-. ameter than said generator and aving' a truncated cone-shaped lower. portion, the lower extremity of the latter of a diameter to fit the upper end of the generator and form a center air passage registering with the central air passage-way of the generator, and an annular air shield extending down from the large upper portion of the combustion section and surrounding said lower truncated cone-shaped portion.

3. In a blue flame burner, the combination with concentric perforated combustion tubes spaced apart to form between them a flame space, said tubes having upper vertical par" allel portions, relatively smaller vertical parallel perforated lower portions, and intermediate inwardly-extending parallel portions connecting the said upper and lower portions, and a generator fitting said lower portions. In testimony whereof I aflix my signature of two witnesses.

ATWELL J. BLACKFORD. Witnesses HUGH- J. MoBRroE,

E. A. SCHNEIDER. 

